Bulletin of the Chemical Society of Ethiopia

Log in or Register to get access to full text downloads.

Remember me or Register

Physicochemecal studies of some hexamethylenetetramine metal(II) complexes

M.O. Agwara, P.T. Ndifon, M.K. Ndikontar


Divalent metal (Mn, Co, Ni) complexes of the ligand hexamethylenetetramine (HMTA, C6H12N4) with sulfate, nitrate and fluoroborate as counter ions have been synthesized in ethanolic media. Whereas the complexes with BF4- and NO3- as counter ions have two molecules of hexamethylenetetramine, those with SO42- as counter ion contain just one molecule of hexamethylenetetramine. The complexes have been characterized by elemental analyses, infrared and visible spectroscopy and room temperature magnetic susceptibility measurements. The results suggest octahedral coordination in which the central metal ion is bonded to hexamethylenetetramine and water molecules.


KEY WORDS: Divalent metal (Mn, Co, Ni) complexes, Hexamethylenetetramine, Sulfate as counter ion, Nitrate as counter ion, Fluoroborate as counter ion



Bull. Chem. Soc. Ethiop. 2004, 18(2), 143-148.
AJOL African Journals Online